Automatically-adjustable exhaust-nozzle for locomotive-engines



J; TROTTER.

AUTOMATICALLY ADJUSTABLE EXHAUST NOZZLE FOR LOCOMOTIVE ENGINES.

APPLICATION FILED NOV. 22, 1920.

1,390,401 Patenteasepu 13, 1921.

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AUTOMATICALLY-ADJUSTABLE EXHAUST-NOZZLE FOR LO(3OIVlIOTIVE-lilNGrIlYl'ES.

T 0 all whom it may] concern Be it known that 1, JAMES TROTTER, a citi' zen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain newv and useful Improvements in an Automatically-Adjustable Exhaust-Nozzle for Locomotive- Engines, of which the following is a specification.

- This invention relates to improvements in automatically adjustable exhaust nozzle for engines, especially locomotive engines, and one of the objects of the invention is to pro vide improved means for controlling automatically the back pressure in the exhaust cavities of the valves.

A further object is to provide improved means for automatically regulating, the velocity of the exhaust steam out of the nozzle to control the draft on the fire by varying the size of an annular opening within the nozzle.

A further object is to provide an improved structure of this character embodying a floating, substantially cone shaped member or element operating in the exhaust nozzle and which element is controlled in itsmovement by the action or pressure of the exhaust steam thereupon, and also embodying means wherebythe weight of the floating element may be varied at will to alter or vary the pressure necessary to actuate the floating element.

To, the. attainment of these ends and the accomplishment of other new and useful objects as will appear, the invention consists in the features of novelty in substantially the construction, combination. and arrangement of the several parts hereinafter more fully described and claimed and shown in the accompanying drawing illustrating this invention and in which :Figure l is a view partly in elevation and partly in vertical section of a portionofan exhaust nozzle having this-improvement applied thereto.

Fig. 2 is a top plan view.

Fig. 3 is a plan viewof a detail.

Fig. 4. is an enlarged vertical sectional view of one of the controlling members. a Referring more'particularly to the drawing the numeral 10, designates the exhaust nozzle which may be of any desired size and configuration and the upper extremity 11, of the nozzle is reducedon its inner. face as at 12, to. provide a circum erential en- Specification of Letters Patent. Patented Sept, 13, 1921 Application filed lfIovember 22, 1920. Serial No. 425,695. v

.largement at the upper end of the-nozzle and which enlargement may be of any des red diameter and depth. I

The nozzle is provided at any suitable po nt with horizontal bearings 13+14, the Inner diameter of the bearing 13, being preferably larger than the inner diameter of the bearing 14.

Arranged within these bearings 1314, andextending across the nozzle is a supportlng element designated generally by the reference numeral 15, which is preferably in the form of a bolt having a head 16, and

athreaded extremity 17. The portion 18, of theelement 15, adjacent the head is of a dlametersomewhat larger than the diameter ofthe portion 19, constituting the threaded extremity, so that the element 15, may be placed in the bearings 1314, by passing the extremity 19, through the bearing 13. The element 15, is also provided with an en larged portion 20, intermediate its ends which is also adapted to pass through the bearing 13., The portion 20, is provided with an opening 21, therethrough for a purpose to be hereinafterset forth and the element'is held against displacement bymeans of the head 16, abutting the bearing 13, and a nut or collar 22, which is threaded upon the other extremity of the element 15,. abuts the bearing 14. e I An upright 23, havin g a shoulder24, is supported by the element 15, and to that end the extremity 25, of the upright .passes through the opening 21, and is secured in position by means of a nut or collar 26, threaded upon the extremity 25, below the element 15, so. as to hold the collar 24:, against the element and the nut 26, may be held against rotation with respect to the upright by means of a suitable fastening Pi 1 This upright 23, may be of any'desired size andheight and isheld in'its upright po sition preferably'by locking the element 15, against rotation in its bearings, in any suitable'manner such asby'means of a-locking pin 28-pas's'ing throughthe head 16, and into a suitable-recess in the bearing 13.

Loosely mounted upon. the upright 23, is an inverted substantially cone shaped ele ment 29, the'larger portion of the element 29, being of a diameter somewhat smaller than the internal diameter of the nozzle' 10,s0 as to provide an annular space 30,-between the element 29, and the Wall of the nozzle at the extremity thereof. The lower extremity of the element 29, is adapted to rest upon the collar 24, and the element 29, is of such a diameter that the action or pressure of the exhaust steam through the nozzle will cause the element 29 to rise and fall upon the upright 23 as the pressure or action of the steam thereon varies.

In order to limit the movement of the element 29 under the influence of the steam pressure thereupon there ay be provided a stop device 31, preferably in the form of a pin which extends through the upright 23, and projects therebeyond. This stop 31, is disposed at any desired point above the element 29, when the latter is resting upon the collar 24:. It will be manifest that when the steam operates upon the element 29, the rising movement of the element will be limited by the stop 31. As theelement 29, rises the size of the annular opening 30, will be varied inasmuch as the upper extremity of the ele ment 29, when the latter rests upon the collar 24, stands substantially flush with the base of the enlarged portion 12, at the tip of the nozzle, but when the element29, rises the upper end thereof will be moved above the base of the enlarged portion 12, and as the element 29, moves in an upright direction, the size of the annular opening 30, will be enlarged. As the pressure increases or decreases this element 29, will rise and fall automatically and through the rising and falling movement of the element the velocity of the exhaust steam out of the nozzle is automatically varied to control the draft on the fire, which is accomplished by varying the size of the annular opening as just described. 7 I

In order to vary the pressure at which the element 29, will be operated, any suitable means may be provided such as a plurality of supplemental elements or weights 32-33, which are adapted to be placed upon the upright 23, and superposed upon the clement 29.

The lowermost weight 32, is preferably provided with a downwardly opening recess 34:, preferably of a diameter slightly greater than the diameter of the opening 35, through which the upright'23 passes and this element '32, is also provided with a recessed portion 36, into which the pin or stop 31, projects,

the two cooperating to hold the element 32, against lateraldisplacement with respect to the upright 23, and the element 29.

With this improved construction it will be manifest that the operation of the element 29, will be automatic and through this automatic operation of the element, controlled entirely by the pressure of the exhaust steam of the exhaust steam out of the nozzle will e automaticallylregu la-ted and this in turn will automatically control the draft on the fire.

Obviously any number of the element 3233, may be provided as desired.

While the preferred form of the invention has been herein shown and described, it is to be understood that various changes may be made in the details of construction, and

*in the combination and arrangement of the several parts, within the scope of the claims, without departing from the spirit of this invention. 7

What is claimed as new is:

1. A constantly open exhaust nozzle for locomotive engines, a floating element operable automatically by the action of the steam thereupon to vary the exhaust blast from the nozzle, the external diameter of the element at all points being considerably less than the internal diameter of the nozzle, and means maintaining the element entirely within the nozzle.

2. A constantly open exhaust nozzle for locomotive engines, a floating element operable automatically by the action of the steam thereupon to vary the exhaust blast from the nozzle, the external diameter of said element at all points being considerably less than the internal diameter of the'nozzle, means for causing the movement of the ele ment to be in a direction lengthwise of the nozzle, and means'maintaining the element entirely within the nozzle. V r V 3. A constantly open exhaust nozzle for locomotive engines, a floating element operable automatically by the action of steam thereupon to vary the exhaust blast from the nozzle, the external diameter of the ele ment at all points being considerably less than. the internaldiameter of the nozzle, means wher ebythe weight of the said'element may be varied at will, and means main taining the element entirely within the nozzle. r

4;. A. constantly open exhaust nozzle for locomotive engines, a floating elementopen able automatically by the action of the steam thereupon to vary the exhaust blast from the nozzle, the external diameter of the element at all points being considerably less than the internal diameter of the nozzle, means whereby the weight of said element may be varied at will, the said means em bodying weights attachable to and detachable from the said element at will, and means maintaining the element Within the nozzle.

5. A constantly open exhaust nozzle for locomotive engines,'a floating element oper= entirel I V y taining the element entirely within the nozzle.

6. A constantly open exhaust nozzle for locomotive engines, an inverted conically shaped floating element operable automatically by the action of the steam thereupon to vary the exhaust blast from the nozzle, the external diameter of the element at all points being considerably less than the internal diameter of the nozzle, the internal diameter of the nozzle adjacent the tip being greater than the diameter of the remaining portion of the nozzle, and means maintaining the element entirely within the nozzle.

7. A constantly open exhaust nozzle for locomotive engines, an upright disposed centrally of the nozzle, a floating element freely and automatically movable upon the upright to vary the exhaust blast from the nozzle, the external diameter of the element at all points being less than the internal di-' ameter of the nozzle, and means maintaining the element entirely within the nozzle.

8. A constantly open upright exhaust nozzle for locomotive engines, an upright disposed centrally of the nozzle, a floating element freely and automatically movable upon the upright to vary the exhaust blast from the nozzle, the external diameter of the element at all points being less than the internal diameter of the nozzle, and a stop connected with the upright to limit the movement of said element in one direction, the said stop operating to maintain the element entirely Within the nozzle. 1

9. A constantly open exhaust nozzle for locomotive engines, a floating element operthe nozzle, and means maintaining the element entirely within the nozzle.

11. A constantly open upright exhaust nozzle for locomotive engines, an upright disposed centrally of the nozzle, a floating element freely and automatically movable upon the upright to vary the exhaust blast from the nozzle, the external diameter of the element at all points being considerably less than the'internal diameter of the nozzle, one or more weight elements adapted to be connected with the said floating element,

the said weight elements being also m0vable upon the upright and with the fl0ating element, and means maintaining the element entirely within the nozzle.

In testimony whereof I have signed my name to this specification, on this 19th day of November, A. D. 1920.

JAMES TROTTER. 

